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1. β Cephei Pulsation Anomalies: Potential New Windows into the Instabilities and Evolution of Early B Stars
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【来源】
[外文会议]
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【作者】
B.A. Goldberg R.S. Polidan R.A. Crowe G.C.L. Aikman R.J. Bambery J.T. Gathright G.J. Odgers
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【摘要】
We have obtained Voyager Ultraviolet Spectrometer (UVS) measurements of well-known β Cephei stars, which now total more than 1500 hours (> 300 pulsation cycles!) and which constitute the most comp...
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2. ZVS HF resonant converter with bidirectional switches
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【来源】
[外文会议]
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【作者】
Zadravec, D. Filipitsch, R. Institute of Electric and Electronic Engineer
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【摘要】
The simulation of the controlled HF AC link resonant power converter with bidirectional switches is shown in the paper. The main-side converter controller fulfils the requirements of sinusoidal input ...
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3. Zoom lens designs for use in sheet-metal cutting by high-power CO2-lasers
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【来源】
[外文会议]
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【作者】
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【摘要】
For best results and the highest speed of cutting sheet metal by high power lasers, the numerical aperture of the focussed beam must be properly matched to the material thickness. To alleviate the nee...
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4. Zone plate x-ray microscope using a laser plasma source
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【来源】
[外文会议]
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【作者】
Hiroaki Aritome Shigeru Nakayama Katsumi Mizunoe Guan-ming Zeng Hiroyuki Daido Masahiro Nakatsuka Sadao Nakai
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【摘要】
An imaging x-ray microscope using an incoherent laser plasma source and zone plates is reported. The He-like line of 4.03 nm (1 $MUL 10$+14$/ photons/sr/pulse) from a carbon plasma produced by a compa...
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5. ZnO-patterned-film piezoelectric transducers for shear acoustic waves
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【来源】
[外文会议]
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【作者】
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【摘要】
In current publications, there is no information about the development and use of film piezoelectric transducers for shear waves, though they can be useful (e.g., for manufacturing a gigaHertz band ac...
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6. ZnO/CdS/Cu(In,Ga)Se/sub 2/ thin film solar cells with improved performance
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【来源】
[外文会议]
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【作者】
Hedstrom, J. Ohlsen, H. Institute of Electric and Electronic Engineer
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【摘要】
This paper reports results from experiments concerning the growth of CuInSe/sub 2/ films on different substrate materials, uncoated, and coated with molybdenum. Specifically the effect on the structur...
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7. Ziv-Lempel encoding with multi-bit flags
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【来源】
[外文会议]
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【作者】
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【摘要】
LZ77 and more recently LZSS text compression use one-bit flags to identify a following pointer or literal. This paper investigates the use of multi-bit flags to allow a greater variety of entities in ...
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8. Zero-voltage-switching realized by magnetizing current of transformer in push-pull current-fed DC-DC converter
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【来源】
[外文会议]
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【作者】
Shoyama, M. Harada, K. Institute of Electric and Electronic Engineer
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【摘要】
A new type of zero-voltage-switched (ZVS) push-pull current-fed DC-DC converter with two synchronous rectifiers in the secondary circuit is presented. ZVS is realized using the magnetizing current of ...
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9. Zero-voltage-switching converters with multi-resonant bipolar switch
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【来源】
[外文会议]
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【作者】
Gegner, J.P. Lee, C.Q. Institute of Electric and Electronic Engineer
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【摘要】
Full-wave mode operation of zero-voltage-switched (ZVS) power converters may be losslessly implemented by splitting the resonant capacitor across both the active switch (MOSFET) and the series diode. ...
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10. Zero-voltage soft-switching discrete pulse modulated three-phase AC-DC power converter with an active filtering function and its extended application
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【来源】
[外文会议]
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【作者】
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【摘要】
This paper presents a state-of-the-art discrete pulse modulated (DPM) three-phase AC/DC power converter with an active-voltage clamped resonant DC link (ACRDCL). Its DSP-based digital control strategy...
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11. Zero-voltage soft-switched PDM three phase AC-DC active power converter operating at unity power factor and sinewave line current
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【来源】
[外文会议]
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【作者】
Nakaoka, M. Yonemori, H. Institute of Electric and Electronic Engineer
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【摘要】
This paper is concerned with a newly improved version of the pulse density modulation (PDM) three-phase AC-DC converter including an active clamped resonant DC link (ACRDCL) and its digital signal pro...
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12. Zero-one permanent is not=P-complete, a simpler proof
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【来源】
[外文会议]
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【作者】
Ben-Dor, A. Halevi, S. Institute of Electric and Electronic Engineer
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【摘要】
Valiant (1979) proved that computing the permanent of a 01-matrix is not=P-complete. The authors present another proof for the same result. The proof uses 'black box' methodology, which facilitates it...
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13. Zero-current soft-switched high-frequency induction-heating inverter using bipolar-mode normally-off SITs
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【来源】
[外文会议]
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【作者】
Ogiwara, H. Nakaoka, M. Institute of Electric and Electronic Engineer
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【摘要】
The authors present a voltage-fed/voltage-clamped high frequency induction heating quasi-resonant inverter circuit which uses a static induction transistor (B-SIT) for soft switching and a specially d...
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14. Zero stress aging and the static fatigue transition in optical glass fibers
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【来源】
[外文会议]
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【作者】
Enrique Cuellar Michael T. Kennedy Daniel R. Roberts John E. Ritter
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【摘要】
glass fibers can exhibit, under severe environmental conditions, an accelerated static fatigue behavior at long times under moderate stresses. This behavior is manifested by a transition, or 'knee', i...
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15. Zero kinetic energy photoelectron spectroscopy and femtosecond dynamics of the cluster Na3
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【来源】
[外文会议]
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【作者】
Author(s): R.Thalweiser, Univ. Freiburg, Freiburg, Federal Republic of Germany S.Vogler, Univ. Freiburg, Freiburg, Federal Republic of Germany Gustav Gerber
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【摘要】
netic energy (ZEKE) photoelectron spectroscopy has been employed to study the spectroscopy and the geometry of the sodium cluster Na$-3$/$+$PLU$/ with nanosecond tunable dye lasers. The fully resolved...
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16. Zero estimation for blind deconvolution from noisy sampled data
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【来源】
[外文会议]
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【作者】
Pi-Tung Chen Michael A. Fiddy Alan H. Greenaway Yung-Yi Wang
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【摘要】
Two- and higher-dimensional bandlimited functions are almost always non-factorizable, meaning that their zeros form a single analytic curve. In principle one can use this property to separate the prod...
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17. Zero electron kinetic energy photoelectron spectroscopy using picosecond lasers
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【来源】
[外文会议]
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【作者】
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【摘要】
solved zero electron kinetic energy (ZEKE) photoelectron spectroscopy is applied to the study of molecular dynamics on the picosecond time scale. The dynamics processes studied include intramolecular ...
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18. Zero current switching high frequency inverter with constant frequency power control
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【来源】
[外文会议]
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【作者】
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【摘要】
Constant frequency power control (CFPC) by phase difference regulation of the gate triggering pulse in the half bridge high frequency inverter (HBHF-INV) is proposed in this paper. The principle of ze...
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19. Zero current switching high frequency inverter and converter utilized overlapping commutation mode in constant frequency power control
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【来源】
[外文会议]
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【作者】
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【摘要】
The principle of a constant frequency power control (CFPC) by phase difference regulation of the gate triggering pulse in the half bridge high frequency inverter (HBHF-INV) and high frequency link DC-...
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20. Zavala Young Scientists: a model for 'adoption' of an elementary school class
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【来源】
[外文会议]
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【作者】
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【摘要】
The University of Texas at Austin's NSF-sponsored Science and Technology Center for Synthesis, Growth, and Analysis of Electronic Materials has initiated an outreach program to elementary school child...
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